Lead-pencil



EL s. sH|MER.

LEAD PENCIL.

APPLICATION FILED MAR. 2| IQZL.

Pafnwd Nov. 8,1921.

'famo 851# UNITED STATES- ELIEBVS. SHIHEB, OF MILTON', PMSYLVANIA.

ATo all whom t may concern.'

Be it known that I,- ELMER S. SHIM'ER, a resident of Milton, in l*the county of Northumberland and State of Pennsylvania, a citi turned to the right, the point being held.

rigid. By a reverse turn of the handle it will enable the lead to be pushed backinto the holder for reloading with new lead. In this manner about three leads will give the same service as the average wooden lead pencil, with greater eiiiciency and less expense. By reasonof the saving of many extra sharpenings the pencil itself retains its full length. Inasmuch as the leads are I renewable from time to time and the mechanical construction of the parts is very rugged, as a mechanical measure, the pencil is. bound to take a step in advance.

The body or holder of this pencil is pref- 'erably made of black, hard rubber, or-wood,

o'r metal can be used in working out substantial pencils without material change of construction of the internal working mechamsm.

It is one of the objects of this invention to popularize the use of lead pencils by placing in the hands of users some eicient pencils at popular prices as all the lead in the pencil is rendered useful by this method whereas fully one-third of a wooden pencil is wasted by 'reason of its short, unwieldy size.

In the accompanying drawings- Figure 1 is a longitudinal section of the parts assembled.

Fig. 2 is aside and end view of the outer tu Fig. 3 is a side view of the inner tube.

Fig. 4 is a side and end view of the threaded pin, and

Fig. 5 is a side view of the handle.v The inner tube 1, has a small bore 2, therethrough. The end 3, with the enlarged opening is drilled out about 5,; of an inch after which the mouth of this enlarged hole "PATENT oFFilcs.

S'pec'ication of Letters Patent.' .l

LEAD-PENCIL.

` Patented'Nov. 1.921;y

. Application led Hal-ch 2, 1921. Serialll'o. 449,127.'

is preferably rolled to reduce its diameter so that the threads of -a tap will receive approximately 4 to 6 threads, the remaining portion of the bore being free of threads but being of larger diameter it will enable the threaded end 4, of the pin 5, to enter the bore ofthe inner tube l, controlled only by the few threads at the mouth thereby reducing friction or binding.

The pin 5, with its threaded end 4, is l inserted through the threaded end -of the inner tube 1, so that the point of the pin enters the central bore backing up the lead, the lead being simply pressed into place from the pointed', end of the inner tube 1. The outer tube 6, has a sliding fit over these parts, its beveled end being brought up to the groove 7, formed cireum erentlally aroundthe inner tubeAl, whereupon it is rolled into permanent engagement therewithl The opposite end of -the outer tube 6, is provided with a key 8, which projects into the groove 9, formed inthe threaded end 4, of

the pin 5, the function of which is to cause the pin to turn as the outer tube 6, is turned, while permitting the pin 5, to travel freely endwise. i

The foregoing constitutes the working parts of the pencil and when the outer-tube 6, is turned on the inner tube 1, the threaded end 4, of the pin 5, will move inor out of the bore 2, in which the lead is held serving to push the lead forward when turned to the right and to make clearance therefor when turned to the left thereby enabling. the lead to be inserted or pushed back.

The body portion 10, is in the form of a tube which may be of hard rubber, wood, or metal and which preferably has a general taper at its forward" end which merges into the tapering forward end ofouter tube 6 and the bore of this body portion is such that the outer tube 6, fits it tightly by frictional con tact.

A pencil of this character should serve its user for an indefinite period all the time reioo maining in good repair by reason of the Ainternal groovelr which .l receives the key whereby whenthe handle or body portion is turned with respect-to the inner tube the pin is moved endwise in one direction ortho' other `to `feed1the lead `forward or provide clearance forit to be'inserted or pushed back grooved, threaded end, adapted to turn 1nv these threads, the groove constructed and adapted to receive the key whereby the turning of the tubes with respect to each other causes an endwise feedof the pin.

3; A pencil including an inner and outer tube rotatably connected together, oneyhaving an internal projecting key and the other provided with internal screw threadsat one end ofl slightly less diameter than its adacent bore, a pin having a longitudinally grooved, threaded end, adapted to turn in i these threads, the roove constructed and adapted to receive the key whereby the turnf -ing -of the tubes-'with respect to each other .or handle and one end :of the inner tube protruding from the end ofthe outer tube, the

said adjacent ends in, the formof a general continuous taper.

4. A pencil includingvan inner and'outer tube rotatably fitted together, the inner'tube having a circumferential 'groove into which one end of the outer tube is rolled whereby the two are rotatably connected together, the opposite end of the inner tube having internal threadsy and thecorresponding v'end of thev outer tubehaving a key projecting in wardlyv into its bore, a pin substantially litting the bore of the inner tube and adapted to push the lead inserted Ainsaid bore `for vward when turned in one'direction, said pin having threads which lit and turnin the4 threads of the inner tube, said threaded portion longitudinally grooved to receive the key of the outer tube.

In testimony whereof I hereunto affix my signature.

ELMER S. SHIMER 

